stats_dens_exponential
Probability density function of the exponential distribution
説明
float stats_dens_exponential(float $x, float $scale)
Returns the probability density at x, where the
random variable follows the exponential distribution of which the scale is
scale.
パラメータ
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x
-
The value at which the probability density is calculated
-
scale
-
The scale of the distribution
戻り値
The probability density at x or false for failure.